The unit had had major water damage. The owners had 2 other plumbers come out that could not find any leaks. The water heater had been removed during the water cleanup process. had to cap two three-quarter lines that feed water to where the kitchen sink is and tie the hot line back into the cold to pressure test the system. pressurize the system with no leaks at this time. seems like the original issue was the 20+ year-old water heater. Turned valves off due to the property being vacant at this time.